Drill-sharpener



J. DITSON.

DRILL SHARPENER.

APPLICATION FILED FEB. Is. 19:1.

1,304,459. Patented May 20, 1919.

3 vwewtoz $519 Gum-MW ms Amp/us PETERS CO..PHO10 LIYND..\YASHINCTON. o.c

] DITSON 0am SHARPENER. memory FILED m. as. 1911.

Patented May 20, 1919.

3 SHEETS -MEET 2.

m\ \Ui H ATTO EV J. DITSON.

DRILL SHARPENEB. APPLICATION Him FEB. 16. new.

3 SHEETS-SHEET 3- 11,364,459. Patented May 20,1919.

'UTED STATES PATENT OFFICE.

JESSE DITSON, OF LITTLETON, COLORADO, ASSIGNOR TO THE J. GEO. LEYNERENGINEERING WORKS COMPANY, OF LITTLETON, COLORADO, A CORPORATION orCOLORADO.

DRILL-SHARPENER.

Specification of Letters Patent. Patented Maygo 1919.

Application filed February 16, 1917. Serial No. 149,033.

To all whom it may concern Be it known that I, Jnssn DITSON, a citizenof the United States, residing at Little-' ing been sharpened.

The object of my invention is to provide an improved means convenientlylocated and mounted on the drill sharpener for pinning out steel to besharpened or a newly sharpened drill steel; also, to provide means foroperating the pinning out means by fluid pressure; to provide a vise tobe used in conjunction with the pinning out means which is mounted onthe drill sharpener, and further, to provide means to adjust the vise tobe used in pinning out drill steels of various diameters.

As is well known in this art a hollow drill steel when sharpened,especially by machine, is apt to have its central bore more or lessclogged or obstructedduring the sharpening operation. This is due to thecrowding of the metal forming the cutting edges into the central bore bythe repeated blows of the sharpening dolly or shaping tool. In order,therefore, that the central bore of the drill may be enlarged or freedfrom obstructions of this kind it is usual to force a pin substantiallyof the diameter of the bore into the drill steel.

In order to accomplish this conveniently and expeditiously the pinningout means are preferably mounted upon the same "base as the sharpeningmeans.

In the drawings annexed hereto and forma part of this application, igure1 is a side elevation of my improved sharpener,

Fig. 2, a plan view of the same,

Fig. 3 an end elevation of the same,

Fig. 4, a cross sectional view of the valve operating the pinning outpiston.

Fig. 5, a cross sectional view of the vise used in connection with thepinning out means,

Fig. 6, the adjustable lower jaw of the vise,

Fig. 7, the adjustable wedge for this jaw,

Fig. 8, the handle and pinion for operating the adjustable wedge, and

Fig.9, the index plate shown in position. In the construction disclosedin the drawings, 1 is a portion of the base of my sharpener having upperand lower jaw members 2 and 3, respectively, between which the drill isadapted to be securely clamped during the sharpening process. Preferablythe upper jaw member 2 is operated by fluid pressure such as compressedair acting through a rod 5 upon a piston in a cylinder, (not shown). Thedrill while being securely held in position and while heated is struckrepeatedly by the forming dolly 6, by which it is shaped and sharpened.During this operation the drill operated upon, if of a hollow type, isobstructed by the flow of metal into the central bore from the partsbeing shapedand sharpened. It therefore becomes necessary to providesome way in which the central bore may be cleared of these obstructions.In order to accomplish this conveniently and expeditiously, a cylinder.7 is mounted upon the base of the sharpener at one side of the clampingjaws 2 and 3. In this cylinder a'piston 8 is forced forwardly andrearwardly by means of fluid pressure which may be furnished from thesame source as that by which the clamping jaws and forming dolly areoperated. Extending forwardly from piston 8 is a rod or pin 9 whichpasses outof the cylinder through a stuffing box 10. In order toconyeniently insert and remove the pin 9 a sleeve 11 is fastened to thepiston and extends rearwardly from the cylinder and passes out of thesame through a stuffing box 12 which is fastened to the rear face of thecylinder by means of a plate 13 and bolts 14. Through a central hole 15in the sleeve 11 a distance piece 16 extends which rests against therear end of pin 9 and is held in tively. To prevent undue wear and tohold the drill properly in line a hardened V- shaped plate 23 is securedby screws 24 in the upper jaw 21. The lower jaw of this pinning out viseis made adjustable in order that steels of different diameters may beset in the vise at the proper position to bring the central hole inalinement with the pin 9. To accomplish this a bottom clamping block 25is set into the lower jaw 22, the lower edge of which is beveled asshown at 26 under which a wedge 27 i adapted to slide.

From the construction it is obvious that by moving the wedge to theright or left as shown in Fig. 5 the lower clamping block is adapted tobe raised or lowered. Preferably the wedge 27 is provided on its lowerside with a rack 28 adapted to mesh with a section of a pinion 29 towhich is fastened a handle 30. To securely lock the pinion 29 andconsequently the wedge 27 in position the handle 30 is provided with aspring pressed stud 31 extending inwardly from said handle 30 andengaging any one of a series of holes 32 formed in an index plate 33mounted upon the lower aw member 22.

-If desired, suitable indications may be placed near each of the holes32 in order to conveniently indicate for what size drill the clampingblock 25 is set.

It will thus be seen from the above description that I have provided adevice in which a drill steel, or a drill bit, after it has beensharpened in the usual manner, may readily be pinned out by pressureexerted by the same fluid as that used for sharp ening the drill steel.While the operation of my device may be obvious from the abovedescription, a brief outline of the method of using the device will begiven.

The drill steel is placed on the lower block 25 after this block hasbeen adjusted to the proper position to accommodate the diameter of the.steel being operated upon. The upper movable jaw 21 is then lowered inthe same manner as when using this jaw member in sharpening the steel.l/Vith the steel securely fastened in place the handle 19 is operated tomove the valve 18 to admit fluid pressure to the rear of the cylinder 7,thrusting the piston 8 forwardly and advancing the pin 9 toward the jawsof the vise 23 and 25. This advance movement of the pin 9 isaccomplished with such force that the pin 9 is thrust well into thedrill steel and completely clears the central bore of any obstruction.The piston may then be reversed by throwing the valve 18 in the oppositedirection by means of the handle 19. If desired this operation may berepeated a number of times, or until the central bore of the steel iscompletely cleared of obstructions.

It is to be understood that while the present showing and descriptiondiscloses only one specific modification of the present invention, otherforms and embodiments are included within the spirit and scope thereof,as expressed in the appended claims.

What I claim is:

1. In a pinning out device for drill steels mounted upon a drillsharpener base, a piston adapted to reciprocate within a cylinder, saidpiston carrying a pin, and a fluid operated pinning out vise mountedupon said sharpener base, said pinning out vise having said adjustablemember, and means to hold said wedge member in any desired positionwhereby drill steels of different diameter may be held in alinement withsaid pin.

3'. In a vise for holding a drill steel in position relative to areciprocatory pin, a movable member and a stationary member, saidstationary member having an adjustable member inserted therein, a wedgemember movement of which varies the position of said adjustable member,said wedge member having gear teeth meshing with gear teeth provided ona pinion, rotation ofsaid pinion serving to alter the position of saidWedge and adjustable member whereby drill steels of different diametermay be held in alinement with said pin.

In testimony whereof I have hereunto set In hand.

y JESSE DITSON.

Copies of this patent may be obtained for five cents each, by addressingthe fCommissioner of Patents.

Washington, D. G.

